(19)
(11) EP 2 724 982 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.08.2016 Bulletin 2016/33

(43) Date of publication A2:
30.04.2014 Bulletin 2014/18

(21) Application number: 13189563.3

(22) Date of filing: 21.10.2013
(51) International Patent Classification (IPC): 
C01B 33/113(2006.01)
H01M 4/485(2010.01)
H01M 4/36(2006.01)
H01M 4/62(2006.01)
H01M 4/02(2006.01)
H01M 4/1395(2010.01)
H01G 11/50(2013.01)
H01G 11/46(2013.01)
H01M 4/38(2006.01)
H01M 10/0525(2010.01)
H01M 4/134(2010.01)
H01G 11/06(2013.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 23.10.2012 JP 2012233972

(71) Applicant: Shin-Etsu Chemical Co., Ltd.
Chiyoda-ku Tokyo (JP)

(72) Inventors:
  • Fukuoka, Hirofumi
    Annaka-shi, Gunma (JP)
  • Saito, Mitsugu
    Annaka-shi, Gunma (JP)
  • Ueno, Susumu
    Annaka-shi, Gunma (JP)
  • Inukai, Tetsuya
    Annaka-shi, Gunma (JP)

(74) Representative: Stoner, Gerard Patrick et al
Mewburn Ellis LLP
City Tower 40 Basinghall Street London EC2V 5DE
City Tower 40 Basinghall Street London EC2V 5DE (GB)

   


(54) Silicon oxide, making method, negative electrode, lithium ion secondary battery, and electrochemical capacitor.


(57) Particulate silicon oxide having a Cu content of 100-20,000 ppm, an Fe content of 20-1,000 ppm, an Al content of up to 1,000 ppm, an average particle size of 0.1-30 µm, and a BET specific surface area of 0.5-30 m2/g is used as negative electrode material in constructing a nonaqueous electrolyte secondary battery. The secondary battery is improved in cycle performance while maintaining the high battery capacity and low volume expansion of silicon oxide.







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